Manufacturing process flow of electromagnetic buzzer? Electromagnetic buzzer is a kind of buzzer, which is different from piezoelectric buzzer. Electromagnetic buzzer is an electronic buzzer that makes sound by using the effect of electromagnetic coil on buzzer, which is used as a sound device for electronic products.

(1) Preparation of electromagnet M: wrap 100 turns of wire on an iron bolt about 6cm long, leave 5cm at the wire end as the lead, stick the coil with transparent adhesive tape to avoid loosening the coil, and then stick it on a box with adhesive tape, and the electromagnet is ready.
(2) Preparation of shrapnel P: cut a long iron sheet with a width of about 2 cm from the iron can box, bend it into a right angle, connect a lead of the electromagnet to the shrapnel, and then stick the shrapnel close to the wood board with adhesive tape.
(3) Use the paper clip as the contact Q, pad the paper clip with a book, stick it firmly with adhesive tape, lead out a wire and connect the circuit.
(4) Adjust the distance between M and P (by moving the box) so that the electromagnet can attract the shrapnel, adjust the distance between the contact and the shrapnel so that they can just contact, and the buzzer can be heard after power on.
(5) Fix the buzzer with glue.
(6) The buzzer passes the test curve of the electroacoustic tester, and OK is pass.
(7) Choose different forms of packaging according to customers' needs.